CN110444700A - A kind of pack case and its ultra-thin lithium cell of ultra-thin lithium cell - Google Patents
A kind of pack case and its ultra-thin lithium cell of ultra-thin lithium cell Download PDFInfo
- Publication number
- CN110444700A CN110444700A CN201910653645.8A CN201910653645A CN110444700A CN 110444700 A CN110444700 A CN 110444700A CN 201910653645 A CN201910653645 A CN 201910653645A CN 110444700 A CN110444700 A CN 110444700A
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- Prior art keywords
- ultra
- lithium
- protective film
- lithium cell
- thin lithium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 106
- 230000001681 protective effect Effects 0.000 claims abstract description 50
- 239000002131 composite material Substances 0.000 claims abstract description 37
- 239000012528 membrane Substances 0.000 claims abstract description 36
- 238000004080 punching Methods 0.000 claims abstract description 29
- -1 polypropylene Polymers 0.000 claims abstract description 20
- 239000004743 Polypropylene Substances 0.000 claims abstract description 19
- 229920001155 polypropylene Polymers 0.000 claims abstract description 18
- 239000000853 adhesive Substances 0.000 claims abstract description 14
- 230000001070 adhesive effect Effects 0.000 claims abstract description 14
- 239000003792 electrolyte Substances 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 5
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 5
- 239000010935 stainless steel Substances 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 230000002633 protecting effect Effects 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 239000004952 Polyamide Substances 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 claims 1
- 229920002647 polyamide Polymers 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 9
- 208000027418 Wounds and injury Diseases 0.000 abstract description 3
- 230000006378 damage Effects 0.000 abstract description 3
- 208000014674 injury Diseases 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract description 2
- 239000004677 Nylon Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 241000209202 Bromus secalinus Species 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 229910021594 Copper(II) fluoride Inorganic materials 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 229910000733 Li alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- OMZSGWSJDCOLKM-UHFFFAOYSA-N copper(II) sulfide Chemical compound [S-2].[Cu+2] OMZSGWSJDCOLKM-UHFFFAOYSA-N 0.000 description 1
- GWFAVIIMQDUCRA-UHFFFAOYSA-L copper(ii) fluoride Chemical compound [F-].[F-].[Cu+2] GWFAVIIMQDUCRA-UHFFFAOYSA-L 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 229940095991 ferrous disulfide Drugs 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000001989 lithium alloy Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000012785 packaging film Substances 0.000 description 1
- 229920006280 packaging film Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of ultra-thin lithium cell pack case and its ultra-thin lithium cells; by the way that punching hole and protective film are arranged in composite membrane; and protective film is affixed on composite membrane for the one side of lithium cathode sheet to be arranged; the size of protective film is less than punching hole; it is advantageously implemented the cathode corresponding surface in pack case and directly passes through adhesive and stick protective film; it is effectively saved complicated film sticking equipment, drying shed and low dew point conditions is not necessarily to, greatly reduces production cost；Ultra-thin lithium cell is made using the pack case of this ultra-thin lithium cell, cathode injury of ear polypropylene layer in lithium battery processing or use process is effectively avoided, improves the yields and reliability of product.
Description
Technical field
The present invention relates to field of lithium, in particular to the pack case and its ultra-thin lithium cell of a kind of ultra-thin lithium cell.
Background technique
For existing ultra-thin flexible package lithium cell or thin polymer lithium battery, the material of pack case generallys use gold
Category and composite plastic film, such as common nylon/aluminium/polypropylene, nylon/stainless steel/polypropylene, polyethylene terephthalate
Ester/aluminium/polypropylene, polyethylene terephthalate/stainless steel/polypropylene etc., polypropylene layer are needed when being assembled into lithium battery
It is coated on the one side that battery cathode of lithium is welded with negative electrode lug, and the thickness of the polypropylene layer of pack case only has 15-35 microns, directly
It is coated on the one side that battery cathode of lithium is welded with negative electrode lug, subsequent processing or use process are needed to apply pressure, be may cause poly-
Propylene layer is damaged, and battery is caused situations such as corrosion and inflatable occur；Existing way is to be welded with the one side of negative electrode lug in cathode of lithium
Pasting protective film, and cathode of lithium is easy to become due to its soft, low and sticking characteristic of intensity when pressure welding negative electrode lug
Out-of-flatness, it is at this time that protective film is smooth and be equably attached to cathode of lithium and need special equipment, and to tension control technology
It is required that high, it is also necessary to -45 DEG C of dew point processing environments below, therefore, existing pack case and its method for manufacturing lithium battery
High to the condition requirement of processing operation, difficulty of processing is big, even if having paid huge equipment cost, the yields of battery is also difficult
To be protected.
Summary of the invention
It is an object of the invention at least solve one of the technical problems existing in the prior art, a kind of ultra-thin lithium electricity is provided
The pack case and its ultra-thin lithium cell in pond enable to pack case to be avoided during installation by cathode injury of ear, difficult reducing construction
The production of lithium battery is completed in the case where degree and equipment cost, and improves yields.
The first aspect of the present invention, provides a kind of pack case of ultra-thin lithium cell, including composite membrane, and the composite membrane includes
Polypropylene layer, the composite membrane include rushing hole and protective film for protecting lithium cathode sheet surface, institute for be arranged lithium battery
It states protective film to be affixed in the composite membrane for the one side of lithium battery lithium cathode sheet to be arranged, the protective film is set to the punching hole
Downside or bottom surface, the size of the protective film cheats less than the punching, and the protection film surface is coated with adhesive.
Further, the composite membrane is that aluminum-plastic composite membrane or stainless steel mould composite membrane.
Further, the protective film is polyimide film, polypropylene screen or polyethylene terephthalate film.
Further, the adhesive of the protection film surface is the adhesive sticker of electrolyte resistance.
The second aspect of the present invention additionally provides a kind of ultra-thin lithium cell, one including battery and as described in any of the above-described
The pack case of kind ultra-thin lithium cell, the battery include the anode rushed in hole for setting gradually the pack case from the inside to the outside
Ear, positive plate, lithium cathode sheet and negative electrode lug, the protective film grow and be wider than the negative electrode lug it is described punching hole in length and
It is wide.
Further, the battery further includes the diaphragm for separating positive plate and lithium cathode sheet, the diaphragm and anode
Electrolyte is filled between piece and lithium cathode sheet；The length of the protective film and the wide length and width for being less than the diaphragm.
Further, the polypropylene layer and the sum of described protection film thickness with a thickness of the composite membrane of the negative electrode lug
35%~65%.
Further, the gel for bonding tab is additionally provided on the anode ear and negative electrode lug, the gel is set
It is placed in the upside of punching hole top edge.
Further, the negative electrode lug pressure welding is in the lithium cathode sheet surface.
Further, lower side of the negative electrode lug pressure welding in the lithium cathode sheet part is arc-shaped edges or straight flange.
The pack case and its ultra-thin lithium cell for a kind of ultra-thin lithium cell that above-mentioned technical proposal provides, at least have has as follows
Beneficial effect: by the way that punching hole and protective film are arranged in composite membrane, and protective film is affixed on composite membrane for lithium cathode sheet to be arranged
On one side, the size of protective film is less than punching hole, is advantageously implemented the cathode corresponding surface in pack case and directly passes through adhesive and sticks guarantor
Cuticula, is effectively saved complicated film sticking equipment, and the process of pasting protective film is not necessarily to drying shed and low dew point conditions, greatly reduces
Production cost；Ultra-thin lithium cell is manufactured using the pack case of this ultra-thin lithium cell, lithium battery can effectively be avoided to process or make
With cathode injury of ear polypropylene layer in the process, the yields and reliability of product are improved.
Detailed description of the invention
The present invention is further explained with reference to the accompanying drawings and examples；
Fig. 1 is a kind of main view of ultra-thin lithium cell pack case of the embodiment of the present invention；
Fig. 2 is a kind of right view of ultra-thin lithium cell pack case of the embodiment of the present invention；
Fig. 3 is a kind of main view of the battery of ultra-thin lithium cell of the embodiment of the present invention；
Fig. 4 is a kind of main view of ultra-thin lithium cell of the embodiment of the present invention.
Specific embodiment
This part will be described in specific embodiments of the present invention, and the preferred embodiments of the invention is shown in the accompanying drawings, attached
The effect of figure be with figure remark additionally book word segment description, enable a person to intuitively, visually understand of the invention
Each technical characteristic and overall technical architecture, but it should not be understood as limiting the scope of the invention.
In the description of the present invention, it is to be understood that, be related to orientation description, for example, above and below, front, rear, left and right etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore be not considered as limiting the invention.
In the description of the present invention, several to be meant that one or more, it is multiple to be meant that two or more, be greater than,
Be less than, more than etc. be interpreted as not including this number, it is above, following, within etc. be interpreted as including this number.If there is being described to first,
Second is only intended to for the purpose of distinguishing technical characteristic, is not understood to indicate or imply relative importance or implicitly indicates institute
The quantity of the technical characteristic of instruction or the precedence relationship for implicitly indicating indicated technical characteristic.
In description of the invention, unless otherwise restricted clearly, the words such as setting, installation, connection be shall be understood in a broad sense, institute
Above-mentioned word in the present invention specific can rationally be determined with the particular content of combination technology scheme by belonging to technical field technical staff
Meaning.
- Fig. 2 referring to Fig.1, the embodiment provides a kind of pack case of ultra-thin lithium cell, including composite membrane 100,
The composite membrane 100 includes polypropylene layer, and the composite membrane 100 includes cheating 120 and for protecting for rushing for lithium battery to be arranged
The protective film 110 on 210 surface of lithium cathode sheet, the protective film 110 are affixed in the composite membrane 100 negative for lithium battery lithium to be arranged
The one side of pole piece 210, the protective film 110 are set to the downside or bottom surface in the punching hole 120, the size of the protective film 110
Less than punching hole 120,110 surface of protective film is coated with adhesive.
Wherein, it should be noted that protective film 110 is affixed in the composite membrane (100) for lithium to be arranged in the present embodiment
The one side of battery lithium cathode sheet can use cutter when using manual pad pasting using the method for manual pad pasting and machine pad pasting
Protective film 110 is cut into suitably sized by tool, and the protective film 110 after cutting is affixed in the composite membrane 100 by craft
It, can also be using rushing shell machine and automatic adhesive sticking machine is pasted automatically automatically for the one side of lithium battery lithium cathode sheet to be arranged
Film is rushing placement composite membrane 100 on shell machine spool automatically, protective film 110 is placed in automatic adhesive sticking machine, is rushing the punching of shell machine automatically
Out when pack case, protective film 110 is affixed on to the one side for being used to be arranged lithium battery lithium cathode sheet in the composite membrane 100, is punched into
Ultra-thin lithium cell pack case is higher than the efficiency of manual pad pasting using the efficiency of automatic coating, and specific pad pasting mode is according to practical item
Part is chosen, and can be realized and protective film 110 is affixed in the composite membrane (100) for the one side of lithium battery lithium cathode sheet to be arranged i.e.
It can.
Wherein, it should be noted that setting punching hole 120 is only the preferred of the present embodiment in composite membrane 100, can not also be set
Punching hole 120 is set, if being not provided with punching hole 120, battery 200 is directly arranged in the position in punching hole 120 in Fig. 1, then passes through rubberizing
Machine sticks protective film 110, and punching hole 120 specifically whether is arranged and is adjusted according to the demand of actual production.
Wherein it is possible to understand, the composite membrane 100 in the present embodiment be can be in existing 100 structure of composite membrane
Any one, it can be ensured that innermost layer is polypropylene layer, and details are not described herein.
Wherein it is possible to understand, the airbag 130 of exhaust can be also used on the composite membrane 100 in the present embodiment, it can
The gas of generation is discharged in the fabrication process, it is ensured that production smoothly completes, and the airbag 130 in the present embodiment is lithium battery system
Common airbag in making, details are not described herein.
Wherein, it should be noted that the protective film 110 is set to the downside or bottom surface in the punching hole 120, depends on
It is the bottom side that lithium cathode sheet 210 is set to the downside in punching hole 120 or lithium cathode sheet 210 is set to punching hole 120；Lithium is born
Pole piece 210 be set to punching hole 120 downside then protective film 110 be set to it is described punching hole 120 downside, turn down packaging film, protection
Film 110 is just covered with lithium cathode sheet 210；By lithium cathode sheet 210 be set to punching hole 120 then protective film 110 is set to institute for bottom surface
State the bottom surface in punching hole 120,110 face lithium cathode sheet 210 of protective film.
Further, in another embodiment of the present invention, the composite membrane 100 is that aluminum-plastic composite membrane or stainless steel modeling are multiple
Close film.
Wherein, it should be noted that the thickness of composite membrane 100 can be any number, and the present embodiment is preferably 0.04~
0.09mm, specific value are chosen according to actual production demand.
Further, in another embodiment of the present invention, the protective film 110 be polyimide film, polypropylene screen or
Polyethylene terephthalate film.
Wherein it is possible to understand, the thickness of protective film 110 can arbitrary value between 0.005~0.05mm, this reality
Applying example is more preferably the value within the scope of 0.01~0.03mm, and specific value is chosen according to actual production demand.
Further, in another embodiment of the present invention, the adhesive on 110 surface of protective film is electrolyte resistance
Adhesive sticker.
Wherein, it should be noted that adhesive can be any type, can be realized and protective film 110 is bonded to lithium bears
210 surface of pole piece, the adhesive sticker of the preferred electrolyte resistance of the present embodiment, it can be ensured that the feelings of electrolyte leakage occur in battery
Sealing is kept under condition, avoids the leakage that electrolyte occurs.
With reference to Fig. 3-Fig. 4, in addition, another embodiment of the invention additionally provides a kind of ultra-thin lithium cell, including battery
The pack case of core 200 and a kind of ultra-thin lithium cell as described in any of the above-described, the battery 200 include successively setting from the inside to the outside
Set anode ear 232, positive plate, lithium cathode sheet 210 and the negative electrode lug 233 of the pack case rushed in hole 120, the protective film
The length and width cheated in 120 are being rushed in 110 grow and be wider than the negative electrode lug 233.
Wherein it is possible to understand, the thickness of the ultra-thin lithium cell can be the arbitrary value within the scope of 0.2~0.9mm,
The present embodiment is more preferably the value between 0.3~0.6mm, and specific value is chosen according to actual production demand.
Wherein it is possible to understand, length and width of the negative electrode lug 233 in punching hole 120 are grown and be wider than to protective film 110 can
Ensure that protective film 110 can be completely covered by 233 surface of negative electrode lug, realizes protecting effect, specific long and width is according to practical life
Situation adjustment is produced, battery seal is not influenced.
Wherein, it should be noted that the lithium battery in the present embodiment can be lithium primary battery, be also possible to chargeable
Lithium battery, details are not described herein.It is understood that lithium primary battery can be ultra-thin flexible-packaged lithium one-shot battery or ultra-thin poly-
Object lithium primary battery is closed, positive active material can be manganese dioxide, fluorocarbons, fluorographite, molybdenum trioxide, five oxidations two
One of vanadium, siliver chromate, copper fluoride, copper chloride, copper oxide, copper sulfide, iron sulfide, ferrous disulfide or two kinds or more mix
Object, cathode are lithium or lithium alloy, and specific material is chosen according to actual production demand.
Further, in another embodiment of the present invention, the battery 200 further includes for separating positive plate and lithium
The diaphragm 220 of negative electrode tab 210 is filled with electrolyte between the diaphragm 220 and positive plate and lithium cathode sheet 210；The protection
The length of film 110 and wide length and width less than the diaphragm 220.
Wherein, it should be noted that protective film 110 is due to needing to be affixed in the composite membrane 100 for cathode of lithium to be arranged
The surface of piece 210, therefore its length and the wide length for being necessarily less than diaphragm 220 and width, avoid the too big influence battery seal of protective film.
Further, in another embodiment of the present invention, the negative electrode lug 233 with a thickness of the composite membrane 100
The 35%~65% of the sum of polypropylene layer and 110 thickness of protective film.
Wherein, it should be noted that negative electrode lug thickness can be the arbitrary value within the scope of 0.01~0.1mm, the present embodiment
Arbitrary value within the scope of further preferably 0.015~0.025mm, specific value are chosen according to actual production demand.
Further, in another embodiment of the present invention, use is additionally provided on the anode ear 232 and negative electrode lug 233
In the gel 231 of bonding tab, the gel 231 is set to the upside of 120 top edges of the punching hole.
Further, in another embodiment of the present invention, 233 pressure welding of negative electrode lug is in 210 table of lithium cathode sheet
Face.
Further, in another embodiment of the present invention, 233 pressure welding of negative electrode lug is in the lithium cathode sheet 210
The lower side divided is arc-shaped edges or straight flange.
Wherein, it should be noted that for 233 pressure welding of negative electrode lug on cathode of lithium, pressure welding length can be 1~100mm range
Interior arbitrary value, the present embodiment are more preferably the arbitrary value within the scope of 2~20mm, can be while ensuring weld strength
It is easy to produce.It should be noted that the lower side of negative electrode lug 233 is the burr that arc-shaped advantageously reduces 233 port of negative electrode lug,
Straight flange is conducive to the production and reconditioning of 233 cutter of negative electrode lug, and concrete shape is adjusted according to actual production demand.
The embodiment of the present invention is explained in detail above in conjunction with attached drawing, but the present invention is not limited to the above embodiments, In
The technical field those of ordinary skill within the scope of knowledge, can also make without departing from the purpose of the present invention
Various change out.
Claims (10)
1. a kind of pack case of ultra-thin lithium cell, including composite membrane, the composite membrane include polypropylene layer, it is characterised in that: institute
Stating composite membrane includes rushing hole and protective film for protecting lithium cathode sheet surface for be arranged lithium battery, and the protective film is affixed on
For the one side of lithium battery lithium cathode sheet to be arranged in the composite membrane, the protective film is set to the downside or bottom in the punching hole
The size in face, the protective film is cheated less than the punching, and the protection film surface is coated with adhesive.
2. a kind of pack case of ultra-thin lithium cell according to claim 1, it is characterised in that: the composite membrane is multiple for plastic-aluminum
It closes film or stainless steel moulds composite membrane.
3. a kind of pack case of ultra-thin lithium cell according to claim 1, it is characterised in that: the protective film is that polyamides is sub-
Amine film, polypropylene screen or polyethylene terephthalate film.
4. a kind of pack case of ultra-thin lithium cell according to claim 1, it is characterised in that: the protection film surface is glued
Mixture is the adhesive sticker of electrolyte resistance.
5. a kind of ultra-thin lithium cell, it is characterised in that: a kind of ultra-thin lithium including battery and as described in claim 1-4 is any
The pack case of battery, the battery include set gradually from the inside to the outside the pack case rush hole in anode ear, positive plate,
Length and width of the negative electrode lug in the punching hole are grown and are wider than to lithium cathode sheet and negative electrode lug, the protective film.
6. a kind of ultra-thin lithium cell according to claim 5, it is characterised in that: the battery further includes for separating just
The diaphragm of pole piece and lithium cathode sheet is filled with electrolyte between the diaphragm and positive plate and lithium cathode sheet；The protective film
The long and wide length and width for being less than the diaphragm.
7. a kind of ultra-thin lithium cell according to claim 5, it is characterised in that: the negative electrode lug with a thickness of described compound
The polypropylene layer of film and the 35%~65% of the sum of described protection film thickness.
8. a kind of ultra-thin lithium cell according to claim 7, it is characterised in that: also set up on the anode ear and negative electrode lug
There is the gel for bonding tab, the gel is set to the upside of punching hole top edge.
9. a kind of ultra-thin lithium cell according to claim 5, it is characterised in that: the negative electrode lug pressure welding is in the cathode of lithium
Piece surface.
10. a kind of ultra-thin lithium cell according to claim 9, it is characterised in that: the negative electrode lug pressure welding is negative in the lithium
The lower side of pole piece part is arc-shaped edges or straight flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653645.8A CN110444700B (en) | 2019-07-19 | 2019-07-19 | Packaging shell of ultrathin lithium battery and ultrathin lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910653645.8A CN110444700B (en) | 2019-07-19 | 2019-07-19 | Packaging shell of ultrathin lithium battery and ultrathin lithium battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110444700A true CN110444700A (en) | 2019-11-12 |
| CN110444700B CN110444700B (en) | 2022-07-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910653645.8A Active CN110444700B (en) | 2019-07-19 | 2019-07-19 | Packaging shell of ultrathin lithium battery and ultrathin lithium battery |
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